the tax plan still doesn't add up. the question for him is whether or not he's able to obscure o that on the stage tonight. >> ezra. thank you. so chris hayes, do we end up in a mega-audience version of paul ryan saying this weekend, i don't really have the time to give you the numbers. i'd bore you if i gave you the math. >> that, to me, is the most fascinating element in this debate. is that he has said time and time again, mitt romney even said at one point, look, i learned from governor christie, if you give people details, they just use it to attack you. he has said explicitly as a matter of strategy, we won't give you more details. so how long can he avoid details on stage with the president for 90 minutes. and the other problem, it's not just bain, it's not just fact that this is the wealthiest man to run for president, well, in nominal dollars, ever, but in real dollars, in a long time. but he is proposing the same thing that republicans always propose when they get into office. the one reliable policy you can